Strawberry Marshmallow
Manga
Comedy, Slice of Life
Strawberry Marshmallow is a Japanese manga series written and illustrated by Barasui about the adventures of four elementary school girls and their older sister-figure. It began serialization in ASCII Media Works' manga magazine Dengeki Daioh in 2002. In 2005, the manga was adapted into an anime television series and a PlayStation 2 video game. Three original video animation (OVA) episodes were later released from February to April 2007. Another two-episode OVA project titled Ichigo Mashimaro Encore was released in 2009. The manga's tagline is "Cute is justice."
Description from Wikipedia, available under CC BY-SA 4.0. May be shortened.